Disappearing Ball Slide - Trick

Much larger version of the typical coin slide. Once you place a ball into the magic slide, it vanishes and reappears at the Magician's will. Also, can magically transform into another and back again! Seems to be impossible, but watch your friends puzzle over this one! Use a ball or any object that will fit. 4 3/4" X 2" X 1 1/2".